Supplemental door operating means



Aug. 27, 1935. R. A. FRITZ 7 2,012,925

SUPPLEMENTAL DOOR OPERATING MEANS Filed Aug. 22, 1934 2 Sheets-Sheet 1 Aug. 27, 1935. R. A. FRITZ 7 2,012,925

SUPPLEMENTAL DOOR OPERATING MEANS Filed Aug. 22, 1934 2 Sheets-Sheet 2 //V l/E' N TOP.

Patented Aug. '27, 1935 PATENT mm a e a U 2,012,925 it v. p H I I v SUPPLEMENTAL noon orEnA r'rNG Rudolph A. Fritz, Cincinnati, Ohio, assignor to Y The Cincinnati Butchers Supply Company,

Cincinnati, Ohio, a corporation of Ohio Application August 'tlz, 1934, Serial No. 741,023 30mins; (o1. 26s+i4') f J My invention relates to supplemental door operating means'and is exemplified -asemployed in operating a supplemental door'for closing the opening above the main door-of a refrigerator in a meat processing plant or the like; the said opening being .providedin the main wallof the refrigerator above and connecting with the opening for the main door J'for permittingthe passage of meat-supporting carriages traveling'on a track extending past said first-named openings Itis the object Of my invention to provide;

novel means for operating a supplemental door; further, I to provide novel means whereby to 'move a supplemental door' in synchronism with the movement of the main door; further, to provide novel means for opening the supplemental door during the beginning'of opening movement of the main door, 'andfo'r closing fthe supplemental door during the latter part of the closing move mentof the main'door." T 4 1 My invention consists in the novelparts, and in the novelconstruction andarrangements of the parts for accomplishing these objects;

In the drawings:

Fig. l isa front elevation showing the general arrangement-of the: doors and a trac'k' of "a refri'g erator, to which my invention ds applied in the present exemplification;

' Fig. 2is avertical treatment: my improved device; taken on'the lin'e '2-'-2 of Fig. 13, and showing the supplemental doorand its operating means in'closed relation-in full lines and in open' relation in dotted linesl' i Fig; 3 is a rear elevationof the same, partly broken away. 7

' Fig. 4 is a cross-sectional detail of the-same,

taken on the irregular line 4-4 of Fig; 2. Fig.5 is. a front elevation'of my. improved de-' vice,showing the supplemental door in raised relation and a track and -:carriage therefor in' operative relation theretathe track andthe support fonts-hanger being shown in cross-section; s '12. Fig. 6 is a plan section of my improved device, taken in the plane of the irregular line 6-4; of Fig. 2. l" y The wall of the exemplifying refrigerator is indicated by the numeral l'l, andis providedwith an opening l2 "normally closed by a m'ain' d'oo'r l3, the opening having'an' extension l4 "therem n su e al? aux lia y opening through which a track lS extends T i track and branches thereof in practice extend to the outside of the refrigerator" to suitable points for moving articles into the refrigerator; for -in stance; sideson'quarters of cattle, carcasses of hogs, hams and other articles-to be placed in the refrigerator,' 'the track and branches thereof also: extending-into} therefrigerato'r for supporting the articles therein and for havin'gthe articles removed from therefrigerator when desired.

The traek is supportedat theinside and at the outside of the refrigerator on' suitable hangers [8 attached to overhead supports l9.;;'A carriage 20 i's-provided with 'a roller ZIrolling on the track, and has a downward extension "22 supplied with a suitable connection 23 for supporting asuitable gambrel-hook or other supporting deviceior sup-' porting the articlewhich suspendedifromthe carriage. The frame of the carriage usually consistsof a-bent piece of flat steel.- The track is comparatively thin} V The supplemental opening in the wall of the refrigerator is provided" for the passage of such carriage into andout of the refrigerator when d the main' door is open It is desirable that this supplemental opening' be closed on-closing of the, mainopeningfso 'as'to -preserve the cold in the refrigerator, and it is desirable 'thatsuch supplemental closure be soconstructed and operated as not to-interfer'e with thetrack.

The usual refrigerator doorll3'is hinged to the wall by hinges 26, and-held in 1 closed position by usuallatchingmeans fls A usual cushioning strip 28 is shown" at the inner face: of the outer D marginalfiange ZS of the door,-f'or engaging the mental door is rounded as at 3 l. I I The lower portionot the supplemental dooris provided with a slot 4 l foraccommodating therail' l5'when -the supplementaLdoorjis closed. The

manner of mounting and-'operating the supple-[ holes 34 in theupper-endsof flanges 35 of-angle- V -plates;Bitchxed to thewall of the supplemental I door ..opening. upper .end of the supplemental do'orpermits this slottobe narrow,s0 that there is little clearance between its side-walls and the rail; i-The'upper erid and sides of the supplementalwdoor are shown provided with cushion strips 42 which contact the front faces of] the walls of the supplemental opening whenflthe-supplemental door Zelbsedi "The lower 'end of the supplemental door is provided with aflexiblelip extending throughout-the width' of the supplecontact with the upper end of the main door when I the doors are closed.

The upperend of the lever-has-aiforlrl55 which" forms a bearing for a pin 56 passingthfough a hole 51 in one end of a link,58'.; .This forms an.

articulating connection between said lever and one end of said link. The other end of the link has articulatingconnection; with the supplemental door, as by beingrec eived in a fork-bearing 59" fixed to the inner face ofnthe supplemental door, an' articulating pin 60, passingthrough a hole in theotherend- :of. saidlinkandsaid fork bearing.

This link may be made adjustable,; as'by forming the sameof two sections having; inner threaded ends Si,- 62,{ respectively havingirightehand and left-hand threads, and having asimilarly thread-v ednut 63 threaded thereover, for lengthening and shortening the linkby rotationof the nut in opp'osite directions Jam nuts 54, 55.1001: the-parts in adjustedrelations. V l ;1

, A guiding connection is provided for the lever, exemplifiedasgan arcuate slotja in" the lever, the. walls of which slide between the inner face of the supporting plate and a washer169' under the head of a bolt 10 extending through ,a hole insaidsupe porting plate and having abushing 'QIGQEiVBd. thereabout, the threaded 1 end of, the bolt having a nut 12 thereon for clamping; the bushing to the 1 plate, so as to leave; sufficient freedom,-. 0r"the walls; off the: slot to slide over the bushing. and between the supporting plate and the washer on said bolt.

The main door ,isprovid'edwith. an operating part coactin'gwlth theglevergshown: asa standard 15 extending: upwardly from; the door and as.ad.- justable relatively to. the: thickness 'of'the door by having securing screws 16;passthrough slots 17 in a base-platen of said standard and screwed into thedoor; washers J9 being located between the heads of saidscrews 'andwthe: walls of" said slots. The standard is adjustably positioned, and is, then clamped in place.:;

Coactin'gmeans are provided. between the lever and said.operating;part,. exemplified:as a slot 81 in the ,lever,.having aamoutlr 82 arranged for receiving a contact.lug;83; on the'standard. e The slot is inthe natureof a cam' slot havingopposite contact faces arranged to be contacted by opposite contact faces onthe lug for respectively rocking the lever in opposite directions respectively upon opening movement andupon; closing movement of the main doorfortcorresponding movements ofthe supplementaldoor. p 7 Y 1 In operatiomthe article that is being conveyed into or out of the refrigerator is. suspended from its carriage and pushed along the rail by the operator. When thecarriage reaches a position adjacent to the maindoor, the operator o'pensthe main doorand thereby automatically operates the supplemental .doorfor opening'thelatter from a position shown in full lines in Fig. 2 to a position shown in dotted lines; in said figureduring. the

' mental door at each side of its slot and making beginning portion of the opening movement of the main door.

The article is then pushed into or out of the refrigerator, the carriage which supports it passing through the supplemental opening. As many articles as may be desired are thus pushed through the openings, and the main door is then closed. The supplemental door is also thereby automaticallyclosed, as from thejpos'ition shown in dotted lines in Fig. 2 to the position shown in full lines in said figure. This closing movement of the supplemental door takes place during the latter portion of the closing movement of the main door.

The opening movement of the supplemental or auxiliary door taking place during the beginning portion of the opening movement of the main door and the closing movement of the supplemental or auxiliary doortaking place during the latter por tion of the closing movement of the main door, insures non-interference between the carriage and the supplemental door, as the operator.must al- Ways have moved the carriage to such extent as to insure. opening andclosing of the main door, thereby insuring freedom of opening andclosing movement ofthe supplemental door.: r 1 ,J When-the doors are open, free passageisper mitted the carriages andarticles suspended'there' from through the door openings.

I When'the main; door is being opened, the contactpart thereon engages theforward wall of the slot-in the" lever, automatically :rocking the lever in forward direction and swinging the; supple-.- mental door outwardly, andmoving the articulate ing axisbetween the lever and its link past a right line between the pivotalaxis-of the lever and the articulating axis of the link with the..supplemental door, to form a locking" toggle "link for maintainingthe supplemental, door in open relation; .L l]

Such movement'of the..-1ever has.moved the mouth;of its slot within the range of movement of the operating part ofthe main door,1so that, when the main door isclosed; the operating part will pass into said mouth and engage the rear wallof said slotfor rocking the lever rearwardly and'breakjng the toggle' lock between the. lever and its link, for automatically moving the lever and the supplemental door; inwardly to the posi tion shown in full, lines inFi 2.; In this'relation the operating. part presses uponthe rear wall of the slot, for pressing the supplemental door toward the margin of 'itsaopening for-exerting pressure upon the cushioning" strips 42'.

' The adjustments provided'between the operating part, and the main door and in the link permit adjustments of the partsfor insuringsu'ch relations. Further adjustments may be had x'by' meansoiabolt 8.51 threaded in a threaded hole in 'thesendfofnthe slottfllandsecured in adjusted positions by a jam nut 86. The inner endoi this bolt is arranged-to strike the'bushing 'l 'l' and actas -astop to the forwardmovement of the lever, thereby aiding in adjusting the position of the mouth-of'theslot. 1

It is; of course, obvious thatthe contact faces on therespective doors for urging opening and clo'singtmovements ofthesupplemental door upon jsimil'arfmovements of the main door may be 'transposed,jand that'other changes and alterat'ions fmay be madein the construction of my imp fir dfeeti' an h detail fli ee Without departingfrom the spirit of my invention asfem- 1. In operating means for a supplemental door supplemental to a main door in a frame, a lever having pivot means at one end ior pivoting the same to the frame'and having articulating connection at its opposite end for connection with the supplemental door, said lever provided with a cam'slot extending lengthwise between said articulating connection and said pivot means and having a mouth, the mouth end of said slot being toward said articulating connection, and arranged for receiving a contact part on saidmain door for opening and closing said supplemental door upon opening and closing of said main door.

2. In operating means for a supplemental door supplemental to a main door in a frame, alever of general triangular form having pivot means at one corner for pivoting the same to the frame, articulating means at another corner for connection with the supplemental door, and a guide between said last-named vcorner and an additional corner of said lever, said lever having a cam between said first two corners arranged for coaction with a contact part on the main door for opening and closingsaid supplemental door upon opening and closing of said main door.

3.- In operating means for a. supplemental door supplemental to a main door in a frame, the combination of a lever of general triangular form having pivot connection at one of its corners named pivot connection by opening movement and by closing movement of said main door to open and close said supplemental door, and an arcuate guide extending along another edge of said lever of general triangular form between said second-named corner'and the third comer of said lever; for guiding said lever in a path of movement perpendicular'to the pivotal axis of said first-named pivot connection. o

' RUDOLPH A. FRITZ. 

